[PATCH v1 21/38] nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache

[Jeff Layton <jlayton@poochiereds.net>]

Have nfs4_preprocess_stateid_op pass back a nfsd_file instead of a filp.
Since we now presume that the struct file will be persistent in most
cases, we can stop fiddling with the raparms in the read code. This
also means that we don't really care about the rd_tmp_file field
anymore.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
---
 fs/nfsd/nfs4proc.c  | 32 ++++++++++++++++----------------
 fs/nfsd/nfs4state.c | 24 ++++++++++--------------
 fs/nfsd/nfs4xdr.c   | 16 +++++-----------
 fs/nfsd/state.h     |  2 +-
 fs/nfsd/xdr4.h      | 15 +++++++--------
 5 files changed, 39 insertions(+), 50 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index a9f096c7e99f..7e21763a35f2 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -758,7 +758,7 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 {
 	__be32 status;
 
-	read->rd_filp = NULL;
+	read->rd_nf = NULL;
 	if (read->rd_offset >= OFFSET_MAX)
 		return nfserr_inval;
 
@@ -775,7 +775,7 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	/* check stateid */
 	status = nfs4_preprocess_stateid_op(rqstp, cstate, &read->rd_stateid,
-			RD_STATE, &read->rd_filp, &read->rd_tmp_file);
+			RD_STATE, &read->rd_nf);
 	if (status) {
 		dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 		goto out;
@@ -921,7 +921,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 		status = nfs4_preprocess_stateid_op(rqstp, cstate,
-			&setattr->sa_stateid, WR_STATE, NULL, NULL);
+			&setattr->sa_stateid, WR_STATE, NULL);
 		if (status) {
 			dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 			return status;
@@ -977,7 +977,7 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	    struct nfsd4_write *write)
 {
 	stateid_t *stateid = &write->wr_stateid;
-	struct file *filp = NULL;
+	struct nfsd_file *nf = NULL;
 	__be32 status = nfs_ok;
 	unsigned long cnt;
 	int nvecs;
@@ -986,7 +986,7 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		return nfserr_inval;
 
 	status = nfs4_preprocess_stateid_op(rqstp, cstate, stateid, WR_STATE,
-			&filp, NULL);
+			&nf);
 	if (status) {
 		dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 		return status;
@@ -999,10 +999,10 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	nvecs = fill_in_write_vector(rqstp->rq_vec, write);
 	WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
 
-	status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
+	status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf->nf_file,
 				write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
 				&write->wr_how_written);
-	fput(filp);
+	nfsd_file_put(nf);
 
 	write->wr_bytes_written = cnt;
 
@@ -1014,21 +1014,21 @@ nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		struct nfsd4_fallocate *fallocate, int flags)
 {
 	__be32 status = nfserr_notsupp;
-	struct file *file;
+	struct nfsd_file *nf;
 
 	status = nfs4_preprocess_stateid_op(rqstp, cstate,
 					    &fallocate->falloc_stateid,
-					    WR_STATE, &file, NULL);
+					    WR_STATE, &nf);
 	if (status != nfs_ok) {
 		dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
 		return status;
 	}
 
-	status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
+	status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
 				     fallocate->falloc_offset,
 				     fallocate->falloc_length,
 				     flags);
-	fput(file);
+	nfsd_file_put(nf);
 	return status;
 }
 
@@ -1053,11 +1053,11 @@ nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 {
 	int whence;
 	__be32 status;
-	struct file *file;
+	struct nfsd_file *nf;
 
 	status = nfs4_preprocess_stateid_op(rqstp, cstate,
 					    &seek->seek_stateid,
-					    RD_STATE, &file, NULL);
+					    RD_STATE, &nf);
 	if (status) {
 		dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
 		return status;
@@ -1079,14 +1079,14 @@ nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	 * Note:  This call does change file->f_pos, but nothing in NFSD
 	 *        should ever file->f_pos.
 	 */
-	seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
+	seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
 	if (seek->seek_pos < 0)
 		status = nfserrno(seek->seek_pos);
-	else if (seek->seek_pos >= i_size_read(file_inode(file)))
+	else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
 		seek->seek_eof = true;
 
 out:
-	fput(file);
+	nfsd_file_put(nf);
 	return status;
 }
 
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 420bc56923fa..a64138620975 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4769,7 +4769,7 @@ nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags)
 
 static __be32
 nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
-		struct file **filpp, bool *tmp_file, int flags)
+		struct nfsd_file **nfp, int flags)
 {
 	int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
 	struct nfsd_file *nf;
@@ -4779,20 +4779,18 @@ nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
 	if (nf) {
 		status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
 				acc | NFSD_MAY_OWNER_OVERRIDE);
-		if (status)
+		if (status) {
+			nfsd_file_put(nf);
 			goto out;
+		}
 	} else {
 		status = nfsd_file_acquire(rqstp, fhp, acc, &nf);
 		if (status)
 			return status;
-
-		if (tmp_file)
-			*tmp_file = true;
 	}
 
-	*filpp = get_file(nf->nf_file);
+	*nfp = nf;
 out:
-	nfsd_file_put(nf);
 	return status;
 }
 
@@ -4802,7 +4800,7 @@ out:
 __be32
 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
 		struct nfsd4_compound_state *cstate, stateid_t *stateid,
-		int flags, struct file **filpp, bool *tmp_file)
+		int flags, struct nfsd_file **nfp)
 {
 	struct svc_fh *fhp = &cstate->current_fh;
 	struct inode *ino = d_inode(fhp->fh_dentry);
@@ -4811,10 +4809,8 @@ nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
 	struct nfs4_stid *s = NULL;
 	__be32 status;
 
-	if (filpp)
-		*filpp = NULL;
-	if (tmp_file)
-		*tmp_file = false;
+	if (nfp)
+		*nfp = NULL;
 
 	if (grace_disallows_io(net, ino))
 		return nfserr_grace;
@@ -4851,8 +4847,8 @@ nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
 	status = nfs4_check_fh(fhp, s);
 
 done:
-	if (!status && filpp)
-		status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
+	if (status == nfs_ok && nfp)
+		status = nfs4_check_file(rqstp, fhp, s, nfp, flags);
 out:
 	if (s)
 		nfs4_put_stid(s);
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 51c9e9ca39a4..fc9f805b2b58 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -49,6 +49,7 @@
 #include "cache.h"
 #include "netns.h"
 #include "pnfs.h"
+#include "filecache.h"
 
 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 #include <linux/security.h>
@@ -3460,14 +3461,14 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
 {
 	unsigned long maxcount;
 	struct xdr_stream *xdr = &resp->xdr;
-	struct file *file = read->rd_filp;
+	struct file *file;
 	int starting_len = xdr->buf->len;
-	struct raparms *ra = NULL;
 	__be32 *p;
 
 	if (nfserr)
 		goto out;
 
+	file = read->rd_nf->nf_file;
 	p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
 	if (!p) {
 		WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
@@ -3487,24 +3488,17 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
 			 (xdr->buf->buflen - xdr->buf->len));
 	maxcount = min_t(unsigned long, maxcount, read->rd_length);
 
-	if (read->rd_tmp_file)
-		ra = nfsd_init_raparms(file);
-
 	if (file->f_op->splice_read &&
 	    test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
 		nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
 	else
 		nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
 
-	if (ra)
-		nfsd_put_raparams(file, ra);
-
 	if (nfserr)
 		xdr_truncate_encode(xdr, starting_len);
-
 out:
-	if (file)
-		fput(file);
+	if (read->rd_nf)
+		nfsd_file_put(read->rd_nf);
 	return nfserr;
 }
 
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index ee23de10663c..732fbb3b5ef1 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -579,7 +579,7 @@ struct nfsd_net;
 
 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
 		struct nfsd4_compound_state *cstate, stateid_t *stateid,
-		int flags, struct file **filp, bool *tmp_file);
+		int flags, struct nfsd_file **filp);
 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
 		     stateid_t *stateid, unsigned char typemask,
 		     struct nfs4_stid **s, struct nfsd_net *nn);
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index ce7362c88b48..c167d7a5b0e6 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -268,15 +268,14 @@ struct nfsd4_open_downgrade {
 
 
 struct nfsd4_read {
-	stateid_t	rd_stateid;         /* request */
-	u64		rd_offset;          /* request */
-	u32		rd_length;          /* request */
-	int		rd_vlen;
-	struct file     *rd_filp;
-	bool		rd_tmp_file;
+	stateid_t		rd_stateid;         /* request */
+	u64			rd_offset;          /* request */
+	u32			rd_length;          /* request */
+	int			rd_vlen;
+	struct nfsd_file	*rd_nf;
 	
-	struct svc_rqst *rd_rqstp;          /* response */
-	struct svc_fh * rd_fhp;             /* response */
+	struct svc_rqst		*rd_rqstp;          /* response */
+	struct svc_fh		*rd_fhp;             /* response */
 };
 
 struct nfsd4_readdir {
-- 
2.4.3